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Re: Ariadne's thread
Posted:
Nov 23, 2011 2:32 AM
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Postponing the Babylonian chapter for a Venus table.
There is wide agreement that the Venus Table
in the Codex Dresden was accurate to one day
in 500 years (Anthony F. Aveni).
Let us check on the value of 61 Venus years being
137 Tzolkin minus 1 day. The mistake is 0.615 days
in 500 years, even better than required.
What if we use the simpler value of 61 Venus years
being 137 Tzolkin? In this case the mistake
accumulates to 4.51 days in 500 years, too big.
Let us try the value from the first sequence
583/1 (plus 584/1) 1167/2 ... 7007/12
12 Venus years are not even one hour longer than
7007 days, so this value is also a good candidate.
How big is the mistake in 500 years?
500 x 365.2422 days (1 - 7007/12x583.92)
= 1.0425 days
Bingo, that's the Maya value of the Venus year,
7007 days for 12 Venus years, mistake 1.0425
days or simply one day in 500 years.
7007 days are 27 Tzolkin of 260 days minus
1 trecena of 13 days, allowing us to draw up
a Venus table:
12 Venus years are 27 Tzolkin minus 1 trecena
24 Venus years are 54 Tzolkin minus 2 trecena
36 Venus years are 81 Tzolkin minus 3 trecena
48 Venus years are 108 Tzolkin minus 4 trecena
60 Venus years are 135 Tzolkin minus 5 trecena
72 Venus years are 162 Tzolkin minus 6 trecena
84 Venus years are 189 Tzolkin minus 7 trecena
96 Venus years are 216 Tzolkin minus 8 trecena
108 Venus years are 243 Tzolkin minus 9 trecena
120 Venus years are 270 Tzolkin minus 10 trecena
132 Venus years are 297 Tzolkin minus 11 trecena
144 Venus years are 324 Tzolkin minus 12 trecena
156 Venus years are 351Tzolkin minus 13 trecena
168 Venus years are 378 Tzolkin minus 14 trecena
180 Venus years are 405 Tzolkin minus 15 trecena
192 Venus years are 432 Tzolkin minus 16 trecena
204 Venus years are 459 Tzolkin minus 17 trecena
216 Venus years are 486 Tzolkin minus 18 trecena
228 Venus years are 513 Tzolkin minus 19 trecena
240 Venus years are 539 Tzolkin
You can establish this table by identifying 12 Venus
years with 7007 days, no need to know that they are
a small fraction of one day longer than 7007 days.
We have now discovered the Venus year of the Maya:
240 Venus years are 539 Tzolkin
Next time: Babylonian clay tablet YBC 7289
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